A/D convertion controlling device and image forming apparatus
AssigneeRicoh Company, Ltd.
InventorMasashi Ooi
Life of this patent
Estimating the term…
Abstract
A reference voltage generating unit generates a plurality of analog reference voltages, and an A/D converting unit converts the analog reference voltages thus generated and an analog input voltage input from an external device to digital reference values. A CPU generates, based on the analog reference voltages and the digital reference values converted from the analog reference voltages, an equation for correcting the analog input voltage to be converted to a digital value falling in a range of the digital reference values. With the equation generated, the CPU calculates the analog input voltage for the digital value obtained by conversion.
Claims7
An analog-to-digital conversion controlling device comprising:
- a voltage generating unit that generates a plurality of analog reference voltages;
- a converting unit that converts the analog reference voltages digital reference values, and that converts an analog input voltage input from an external device to a digital value;
- an equation generating unit that generates, based on the analog reference voltages and the digital reference values, an equation for correcting the analog input voltage to be converted to a digital value falling in a range of the digital reference values;
- and
- a calculating unit that calculates the analog input voltage corresponding to the digital value by using the equation generated by the equation generating unit.
An-image forming apparatus which controls a unit thereof based on an analog input voltage calculated from a digital value indicating a state of the unit by an analog-to-digital conversion controlling device, the analog-to-digital conversion controlling device including:
- a voltage generating unit that generates a plurality of analog reference voltages;
- a converting unit that converts the analog reference voltages digital reference values, and that converts an analog input voltage input from an external device to a digital value;
- an equation generating unit that generates, based on the analog reference voltages and the digital reference values, an equation for correcting the analog input voltage to be converted to a digital value falling in a range of the digital reference values;
- and
- a calculating unit that calculates the analog input voltage corresponding to the digital value by using the equation generated by the equation generating unit.
Dependencies are inferred from the claim text.